This fully waterproof electronic collar is popular with dog trainers and pet owners. The training systems will help you control and train your dog within effective range through a number of functions, including vibration alert, sound warning, electrostatic punishment, etc. Key Features: Fully Waterproof Design: The receiver has super waterproof performance, so your pet can swim with it or walk in the rain with it Adjustable values: The vibration and shock values can be adjusted from 1 to 99. If this is your first time using this pet training system, try the step-by-step values to find the right one 3 training modes: Shock / Vibration / Sound / Lighting With blue backlit display: Can be used at night Remote control: The remote control is 800 m (without interference) 3 channels: The remote transmitter has 3 signal channels and can control 3 receivers of the same model Auto power saving: Auto sleep mode and memory functions Adjustable collar size: The maximum adjustable length is 70